After you have pythongimp installed, here's how you install the plugins: First download the file. The files in the registry are saved as .py.txt files due to a bug, so you need to rename them to .py files, then save them to your plugins folder. There are usually 2 plugin folders, either works, you can see what they are in the gimp preferences. You can also specify another plugin folder there if you want to.

http://registry.gimp.org/node/25198 - This one appears in the Filters > Render menu and it automates creating a simple texture, it does it the same way that it is done in the 1st part of my tutorial. You get to adjust all the settings the same way you get to when you do it manually.

http://registry.gimp.org/node/25199 - This creates a bevel in the shape of the current selection. It's a neat tool for adding bevels on land areas, you can select the land area by Alpha to Selection, then use this plugin to add a bevel layer in the shape of the land. The bevel appears on a separate layer, so you get to adjust the opacity/layer mode settings of the bevel later if you need to.

In case anyone actually uses these... the latest versions of my plugins can now be found from the GIMP registry, so I won't be uploading them to Fileden anymore, and the links here now lead to the registry... the registry software has a slight glitch that renames the plugins as ".py.txt" so you'll have to remove the ".txt" extension from them when you copy them to your plugins directory.

The default bevel only lets you select the strength of the bevel. You don't get to choose things like light angle, shape curves, inner/outer bevel, noise, elevation, layer mode, opacity, etc. Also, my script has a preview.